Cementing machine



Jan. 16, 1934:. A. s. JOHNSON 1,943,322

'CEMENTING MACHINE FiledAug. 5, 1930 2 Sheets-Sheet '1 1T; I/IZ Jan. 16,1934. AUSJ-J'IQHNSON 1,943,322

CEMENTI'NG} MACHINE I I Filed Aug. 5, 1930 2 Sheets-Sheet 2.

Patented Jan. 16, 1934 UNITED STATES PATENT OFFICE CEMENTING MACHINEApplication August 5, 1930, Serial No. 473,155, and in Germany July 8,1930 12 Claim.

a coating of cement,- such as latex, to the wholeof one surface of apiece of work, such, for example, as the sole of a shoe or the lift of aheel. In the patented machine, the cement is applied to the undersurface of the work by means of a cylindrical roll dipping in a recepta-15 cle, and the progress of the work as well as the contact of the workwith the cement-applying roll is controlled by means of a driven presserroll bearing against the opposite side of the work and mounted upon apivoted carrier. Provision is made for adjusting the initial undisplacedposition of this presser roll with respect to the applying roll so as tomaintain the desired separation between, and hence to prevent contactof, the two rolls, and-a spring is provlded for holding the presser rollyieldably against the work. The quantity of cement carried up by theapplying roll for application to a piece of work is determined by meansof a driven doctor roll positioned adjacent to the upgoing side of theapplying roll. The position of this doctor roll with respect to theapplying roll may be readily adjusted so as thereby to control thequantity of cement. Upon the delivery side of the machine there isprovided a work stripper in the form of a grid having pointed endspositioned closely adjacent to the applying roll and positionedalongside the path of the work so that coated pieces of work will bestripped from said roll and carried away from the machine.

An object of this invention is to provide an improved machine of thetype shown in the Cosgrove Letters Patent to which reference has beenmade above.

When such machines are utilized for flimsy pieces of work a position ofthe work stripper substantially parallel with a line tangent to thesurface of the applying roll at the point of contact with the presserroll and hence parallel to the normal path of the work is desirable.With other kinds of work having greater rigidity, it becomes desirableto position the work stripper in such a way that there will be room forthe hand of the operator to grasp the oncoming piece of work. Inaccordance with one feature of the invention the illustrated machineprovides an adjustably mounted work stripper the operative position ofwhich may be substantially parallel to the normal path of the work or itmay be angularly related thereto and, as shown, depressed below thehorizontal path. Preferably too, and as illustrated, the work stripperis mounted for displacement, in case of accidental jamming of the workbetween the applying roll and the stripper, by supporting it upon pivot55 studs which are frictionally held in place, means being provided tolimit the movement, of the stripper toward the roll.

In accordance with still other features of the invention, theillustrated machine is so constructed that adjustment of the initialposition of the presser roll to accommodate thin or thick work does notdisturb the tension of the spring by means of which this presser roll is-held against the work. Provision is also made for independentlyadjusting the tension of the spring when desired as, for example, whenadditional pressure is needed to hold soles with beveled shanks againstthe cementing roll.

Further, as illustrated, a felt wiper is carried in a through slot inthis carrier to bear against the down-going surface of the presser rollso as to remove therefrom any cement which may accidentally be depositedupon the presser roll. As illustrated, this felt may be removed forrenewal by detaching a closure plate for said slot. A finger guardpositioned adjacent to the bite of the rolls, to prevent the operatorfrom pushing the work forward far enough to get his fingers caughtbetween the two rolls, is held in position by the retaining means forthe closure.

In the illustrated machine, a guard is positioned close to the upgoingside of the doctor roll and breaks up the bubbles of the foam caused bythe constant agitation of thelatex cement and also prevents foam or afilm of cement on the doctor roll from being carried around to theapplying roll thereby insuring against uneven application of cement bythe applying roll. The guard in question is so mounted upon the carrierfor the doctor roll that it may be adjusted with respect thereto whensetting up the machine but having once been adjusted will be retained inthe same relation to the doctor roll regardless of any adjustment of theposition of the latter.

These and other features of the invention will now be more fully setforth in the following specification with reference to the accompanyingdrawings, in which Fig. 1 is a side elevation of the machine with partsbroken away and in section;

Fig. 2 is a detailed perspective view of the felt wiper and the guardplate;

Figs. 3 and 4 are fragmentary views on an enlarged scale of the mountingfor the work stripping grid;

Fig. 5 is a plan view of the machine; and

Fig. 6 is a detailed perspective showing the foam guard and the mannerof mounting the same.

The machine herein illustrated follows the general arrangement of thatshown in the prior Letters Patent mentioned above and has a tw0- partframe, the lower portion 10 of which is mounted upon legs 12 and theupper portion 14 of which is pivotally mounted on the lower portion by apin 16. Attached to the lower portion 10 is a cement receptacle 18 inwhich a constant supply of cement at a predetermined level is maintainedby means of a barometric feed can 20. This can is supported upon a neck22 of the receptacle by means of a ring 24 which is threaded on the canso that the height of the cement in the receptacle may be accuratelydetermined. Latches 26 are attached to this ring and are arranged toengage lugs 28 on the receptacle and to lock the can 20 to thereceptacle until it has been turned to a position in which a valve 30 atits lower end is closed before said can can be removed from thereceptacle. This arrangement of latches and valve is shown and claimedin Letters Patent of the United States No. 1,922,297, granted August 15,1933, upon an application which is a continuation in part of my priorapplication Serial No. 346,383, filed March 12, 1929, for Improvementsin straightening and cementing machine for French binding.

The machine is provided with a cement applying roll 32 which hasayielding surface resulting from the use of a rubbery composition likethat employed for printers ink rolls. This roll is journaled in thelower portion 10 of the frame and driven in a counterclockwise directionas viewed in Fig. 1. The quantity of cement taken up by the roll iscontrolled by means of a driven doctor roll 34 which is rotated througha gear train 36 from the applying roll 32 so that it turns also in acounterclockwise direction as viewed in Fig. 1. A cover 37 protects theoperator from this gear train 36. The doctor roll 34 is supported inhangers 38 forming part of a carrier 40 (Fig. 6) which is attached byscrews to a sliding cover 42 mounted in guideways in the upper portion14 of the frame. This cover 42 has a depending slotted end portion 44which engages a groove in a hand screw 46 so that it may be moved backand forth thereby to determine the relation of the doctor roll 34 to theapplying roll 32. Also as in said prior Cosgrove Letters Patent, themachine is provided with a presser roll 50 mounted in the arms of asubframe 52 pivoted at 54 upon a bracket 56' which is attached to theupper portion 14 of the frame. As herein illustrated, the presser roll50 is made up of a series of rings 51 which are yieldably mounted sothat the surface of the roll will conform to the surface of the workeven though the work is of uneven thickness. Grooves formed betweenadjacent rings prevent a sticking together of the rings when cement isinadvertently lodged thereon. These rings 51 are held upon a spidercomprising end plates 53 joined by a series of rods 57. Positioned uponthese rods are v-snaped supporting members 59, the outer ends of whichbear against the inner circumference of the corresponding ring and theV- shaped members are held apart by a series of coil springs 61 allowingthem to yield inwardly as pressure is applied to the rings which make upthe presser roll 50. In order that there may not be a shifting of therings around the supporting members, each one of the rings is providedwith a pin 63 the head of which is posi-' tioned between two of saidV-shaped supporting members so that any drag imparted to the rings asthey feed the work will be immediately taken up by the adjacentsupporting members 59, 57 and slipping of the rings with respect to thesupporting members prevented. This avoids a .wrinkling of the surface ofthe work which is sometimes found. This presser roll is driven throughgears 58 by means of power supplied to a driven pulley 60. Pieces ofwork such as a sole 62 are presented to the bite of the rolls 32 and 50by being pushed along a work table 64 from right to left. The work table64 has at its far side an upstanding rib 65 so that the operatorstanding in front of the machine as viewed in Fig. 1 will fan a handfulof soles and bring them successively against this rib as he drops themon to the table and pushes them ahead into contact with the rolls- Asherein shown the axis of the presser roll is set. slightly ahead of theaxis of the cementing roll so that pieces of work will be deflectedslightly downwardly by reason of this relation of the rolls without anydanger that the work pieces may be turned upwardly to such an extentthat they are inverted after they are delivered from the roll.

In order to prevent pieces of work from following the applying roll 32back into the receptacle, the machine is provided with a work stripper70. The stripper comprises a casting in the form of a grid on which areformed a series of parallel projecting fingers 72 on the upper surfaceof each of which is formed a rib 74 thereby to lessen the surfacecontactbetween said stripper and the cemented surface of the work. Itwill be noted from Fig. 1 that the corner of the frame has been cut awayat '76 so that the work stripper may be mounted in any desired angularrelation to and below the path of the oncoming work. The position of thestripper 70 may vary from a substantially horizontal position indicatedby dotted lines in Fig.3 where it is substantially parallel to thenormal path of the work and suitable for flimsy work to an angularlyrelated position depressed below the horizontal by an amountcorresponding to the angle at which the frame is cut away at 76. Byreason of this depressed position of the work stripper, the operatorshand may be inserted beneath oncoming soles, for example, to grasp themby the edges, and further there is less tendency for pieces of workbeing fed through the machine to catch between the pointed ends 78 ofsaid stripper and the urface of the applying roll 32. Furthermore, thestripper is pivotally mounted and frictionally held in position so thatit may readily be displaced away from the surface of the applying roll32 by the pressure of .work, thereby avoiding possible damage to theroll 32. The stripper may also be displaced by the operator in case hedesires to clean out any particles which may have been caught under thepoints '78. To this end, the stripper is supported by means of bolts 80passing through lugs 82 at the ends of the stripper and through studs 84frictionally held in position in the upper portion 14 of the frame. Theframe 14 is recessed at 86 around the studs 84 to receive springs 88.Each of these springs is held in position by a collar 90 and nuts 92 andbetween the head of each stud 84 and the frame is a leather washer 94.It follows, therefore, that the stripper '70 may readily be turned withthe studs 84 in a counterclockwise direction to carry the points 78 awayfrom the soft surface of the applying roll 32. when turned back towardthe roll the operative position of the grid is determined by eccentricstops 96. These eccentric stops 96 are pivoted in the frame 14 and maybe locked in adjusted position by nuts 98. In case it is desired to setthe stripper in a different angular relation to the periphery of theroll 32, it may be necessary to change the relation of the supportingbolts to the studs 84. For this purpose the bolts are threaded in theenlarged heads of the studs 84. The bolts are shouldered at 100 beneaththe lugs 82 on the stripper so that by releasing clamp nuts 102\they maybe rotated in said lugs and the position of the stripper 70 adjusted. Itwill be understood, however, that an inclined position similar to thatwhich is illustrated in full lines in Fig. 3 is the usual position forthe stripper.

Provision is made here as in the machine of the Cosgrove Letters Patentfor adjusting the initial position of the presser roll 50. An improvedarrangement is provided for this purpose in which the spring tension andthe initial position may be readily adjusted independently. To this endthe arms of the sub-frame 52 which supports the presser roll 50 arejoined by a cross bar 104 having a central upwardly projecting lug 106which is apertured to receive a headed bolt 108 threaded in a bushing110 itself threaded in the upper end of the bracket 56. A hand wheel 112pinned to the right end of this bolt 108 facilitates the adjustment ofthe initial position of th presser roll 50.

When the machine is set up at the factory, the threaded bushing 110 isadjusted to such a position that contact with the hub of the hand wheel112 will prevent the presser roll from being brought into contact withthe cementing roll. After the bushing 110 has been so adjusted, it isheld in position by a set screw. The presser roll is yield-ingly heldagainst the work by means of a spring 114 surrounding the bolt 108 andpressing against a washer 116 which bears against the lug 106 and theother end of the spring 114 bears against the hand wheel 118 which isthreaded on the bolt 108, thus leaving the spring tension undisturbed bychanges in the position of the sub-frame 52. It will be understood thatthe bolt 108 fits loosely in the lug 106 so that a slight angularmovement of the lug with respect to the bolt is permitted. This combinedarrangement enables the operator to adjust the position of the presserroll 20 for thin soles or thick soles, for example, and then ifnecessary to adjust the spring pressure with which the roll is heldagainst the work, such as thin soles or those with beveled shankportions, quite independently of its initial position.

In order to keep the surface of the presser roll 50 clean so that anybits of cement which are accidentally picked up on said roll will not becarried over to the surface of the work, the machine is provided with awiper felt 120 married in the slot of the cross member 104. In the uppersurface of the cross bar in which the felt is mounted, holes 129 havebeen provided through 4 which a lubricant such as kerosene may beapplied to the felt to facilitate the cleaning action of the felt uponthe presser roll. The slot for the felt extends through said crossmember and is closed at the rear by a plate 122 secured thereto byscrews 124. This plate furnishes a support for adjusting screws 126which press against a backing bar 128 by means of which the contact ofthe felt with the presser roll may be evened up. With such an assembly,it is possible to renew the felt by removing the screws 124 and takingout the backing bar 128, after which the felt itself may be removed fromthe. machine without disturbing any of the other parts. The screws 124are also used to hold in position a finger guard 130 shown in dottedlines in Fig. 1

and in full lines in Fig. 2. This finger guard extends down toward thework table 64 adjacent to the bite of the rolls so that the operatorpushing a piece of work along said table for engagement by the rollscannot accidentally get his fingers caught between the rolls.

After continued use of the machine, there may be a formation of foam inthe latex in the chamber provided by the lower frame portion 10 abovethe receptacle 18 and this foam may, unless otherwise prevented, causethe cement to overflow.

The foam may also be carried around to the applying roll 32 to formbubbles or irregular spots thereon which will appear upon the finishedwork and prevent a perfectly uniform application of cement to the coatedsurface. Accordingly, the machine is provided with a foam guard orbreaker in the form of a scraper plate 140 having a depending sharpedged portion closely adjacent to the doctor roll 34 and'a horizontalslotted portion 142' for adjustable engagement with holding screws 144.These screws are threaded in an extension of the casting 40 whichsupports the doctor roll 34. As a result, when the machine is beingassembled the foam breaker 140 may be placed in correct relation to thedoctor roll 34 and then in the use of the machine this relation may bemaintained regardless of the adjustment of the doctor roll by means ofthe hand screw 46, because the foam breaker is supported upon theadjustable support for the doctor roll itself.

In the 'use of the machine, it will be assumed that the can 20 has beenfilled with cement such as latex so that the receptacle 18 is filled tothe desired level and that the position of the work stripper 70 has beenadjusted to suit the conditions in a particular factory by manipulationof the eccentric studs 96 and if necessary of the supporting bolts 80.After this, the operator will adjust the position of the doctor roll 34by manipulation of the hand screw 46 and will determine the position ofthe presser roll support by manipulating the hand wheel 112, dependingupon whether relatively thin or relatively thick work is to be handled.The spring pressure with which the presser roll is held against the workmaybe varied if desired by turning the hand wheel 118, after whichpieces of work may befed rapidly over the table 64 without danger thatthe upper surfaces of the pieces will be soiled with cement or that theoperators fingers will be caught between the rolls.

Having thus described my invention, what I claim as new and desire tosecure by Letters Patent of the United States is:

1. In a cementing machine, a cement-applying roll arranged to coatpieces of work, a presser roll cooperating therewith, a work strippercooperating with the delivery side of the applying roll, and adjustablesupporting means for said work stripper movable from a position wherethe work stripper is substantially parallel with a linetangent to thesurface of the cementapplying roll at the point of contact with saidpresser roll to a position where it is at an acute angle thereto.

2. In a cementing machine, co-operating rolls for feeding the work alonga predetermined path, one of said rolls being arranged to apply cementto a surface of the work, a work stripper positioned adjacent to andco-operating with the delivery side of the applying roll, and means foradjustabiy supporting said work stripper at each of a plurality ofwidely separated angles to the normal path of the work in each of whichit is in operative relation to the applying roll..

3. In a cementing machine, a frame, a cementapplying roll journaledtherein and arranged to coat pieces of work presented to the uppersurface of the roll, a work stripper positioned adjacent to the deliveryside of the roll, pivot means for supporting said work stripper, saidpivot means being frictionally held in position in the frame whereby thework stripper may be displaced under abnormal pressure, and means forlimiting the movement of the stripper toward the roll.

4. In a cementing machine, a frame, a cementapplying roll journaledtherein and arranged to coat pieces of work presented to the uppersurface of the roll, a work stripper positioned adjacent to the deliveryside of the roll, displaceable supporting means for said work stripper,allowing the stripper to be pushed out of its normal position, and anadjustable stop for determining the normal position of the work stripperwhen returned after displacement.

5. In a cementing machine, a frame, a cementapplying roll journaledtherein and arranged to coat pieces of work presented to the uppersurface of the roll, a work stripper positioned adjacent to the deliveryside of the roll and mounted upon displaceable frictionally-held meansthereby holding the work stripper displaceably in position, and anadjustable. stop co-operating with said means to determine the normalposition of the work stripper.

6. In a cementing machine, a frame, a cementapplying roll journaledtherein and arranged to coat pieces of work presented to the uppersurface of the roll, a work stripper positioned adjacent to the deliveryside of the roll, pivot bolts frictionally positioned in the frame,means on said work stripper for securing it to said bolts, and eccentricstops in the frame positioned to engage said securing means thereby todetermine the normal position of the work stripper as it is returned toposition after displacement.

7. In a cementing machine, a frame, a cementapplying roll journaledtherein and arranged to coat pieces of work presented to the uppersurface of the roll, a work stripper positioned adjacent to the deliveryside of the roll, pivot bolts frictionally positioned in the frame, rodsextending inwardly from said work stripper and threaded in said pivotbolts, and adjustable stops co-operating with said rods.

8. In a cementing machine, a frame, an applying roll, a presser rollassociated with said applying roll, a presser-roll carrier pivoted insaid frame, a coiled spring urging said presser roll toward the applyingroll, means for 'adjusting the tension of said spring, and means bearingagainst said frame and passing through the coils of said spring to limitthe movement of the presser-roll carrier toward the applying roll, saidmeans being adjustable to determine the initial separation of thepresser roll and the applying roll without varying the tension of thespring.

9. In a cementing machine, an applying roll, a presser roll co-operatingwith said applying roll, a fixed bracket, a carrier for said presserroll mounted for movement with respect to said fixed bracket to vary therelation of the said rolls, threaded means for limiting movement of saidcarrier with-respect to said bracket in a direction to carry the presserroll toward the applying roll, and an adjustable stop upon said bracketlimiting the adjustment of the threaded means thereby to prevent thecontact of the presser roll with the cementing roll.

10. In a cementing machine, a frame, an applying roll mounted therein,'a (ho-operating presser roll, an adjustable carrier forsaid presserroll, means extending between'said carrier and said frame for limitingmovement of the presser roll toward the applying roll comprising a bolthaving a hand wheel, a bushing adjustably mounted in the frame in whichbushing said bolt is threaded, and means for securing said bushing inadjusted position whereby, by co-operation between the bushing and handwheel, movement of the presser roll toward the applying roll is limitedand contact between the two prevented.

11. In a cementing machine, an applying roll, a presser rollco-operating with said applying roll, a fixed bracket, a carrier forsaid presser roll mounted for movement with respect to said fixedbracket to vary the relation of the said rolls,

movable carrier for said presser roll, a through slot in said carrierhaving one end open and accessible to the operator and the other endadjacent to the presser roll, a wiper positioned in said slot to engagethe surface of the presser roll, and a detachable cover, for said slot,carrying screw means foradjusting. the pressure 0 the wiper upon theroll.

ARTHUR S. JOHNSON.

